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preemption

C2
Uncommon

Pronunciation

UK

  • /priːˈɛmpʃən/

US

  • /ˌpriˈɛmpʃən/

Meanings

Noun

  1. a legal rule that a higher government's law overrides a lower government's law

  2. the act of acting first to block, replace, or take priority over something else

  3. the interruption of a running computer task so a higher-priority task can run

More meanings
  1. a legal or contractual right to buy, claim, or act on something before others can

Beyond the definition

Imagine two friends both want the last slice of pizza. If one friend preempts the other—perhaps by grabbing it before the other can even reach for it—they've acted first and secured the prize. Preemption is all about taking action to ensure a specific outcome, often by preventing someone else from doing so first.

It is commonly used in law and politics. For example, a federal law might preempt a state law, meaning the federal law takes precedence. Think of it like a stronger rule overriding a weaker one. You can also take preemptive action to stop something before it even begins, such as a company launching a campaign to counter potential negative publicity before it can spread.

Examples

  1. 1

    Military action

    The general ordered a preemption of the attack before enemy forces could cross the border.

  2. 2

    Legal override

    The court said the city rule was invalid because of federal preemption.

    • Domainfederal preemption

      when national law overrides state or local law

  3. 3

    Broadcasting

    Viewers complained about the preemption of the game by a live news conference.

    • Domainpreemption of a program

      replacing it with another broadcast

  4. 4

    Investor rights

    Existing investors were given preemption rights when the company issued new shares.

    • Domainpreemption rights

      the first chance to buy before others can

More examples
  1. 5

    Operating systems

    In some operating systems, preemption stops one program from using the processor for too long.

See also

Similar

Shades of meaning

  • preemptive strike

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Forms and spellings

1 form open this card.

Main spelling

  • preemptionnoun